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Andrea Di Biagio 4632c8a6b8 When GVN removes a redundant load, it should not modify the debug location of the dominating load.
In the case of a fully redundant load LI dominated by an equivalent load V, GVN
should always preserve the original debug location of V. Otherwise, we risk to
introduce an incorrect stepping.
If V has debug info, then clearly it should not be modified. If V has a null
debugloc, then it is still potentially incorrect to propagate LI's debugloc
because LI may not post-dominate V.

Differential Revision: https://reviews.llvm.org/D27468


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@288903 91177308-0d34-0410-b5e6-96231b3b80d8
2016-12-07 12:31:36 +00:00
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include [PM] Add some more logging to make it more clear when the CGSCC 2016-12-07 10:33:15 +00:00
lib When GVN removes a redundant load, it should not modify the debug location of the dominating load. 2016-12-07 12:31:36 +00:00
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test When GVN removes a redundant load, it should not modify the debug location of the dominating load. 2016-12-07 12:31:36 +00:00
tools [llc] Fix -stop-after=consthoist initializing the pass. 2016-12-06 23:49:58 +00:00
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CMakeLists.txt [CMake] Fixing clang standalone build 2016-12-06 17:09:29 +00:00
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